Your answers will be here Connection problems? Check here first! (click on link). This is broken up into sections. The 1st section with software firewalls. (If you're using windows XP then you will have an XP firewall.) The 2nd section with enabling UPnP on your connection device. The 3rd section with forwarding a port (opening a port for uploading.)

Go to your control panels to find XP firewall. You may need to follow the wires from your computer to find your connection device & find what brand it is.